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US 2019/0196150 A1Published application
Lens and manufacturing method thereof
AssigneeRays Optics Inc.
InventorsBing-Ju Chiang, Hsin-Te Chen, Kuo-Chuan Wang, Sheng-Da Jiang
Life of this patent
Estimating the term…
Abstract
A lens including a first lens group and a second lens group is provided. The first lens group is disposed between a magnified side and a minified side. The second lens group is disposed between the first lens group and the minified side. The lens includes six or less lens elements, and at least four of the six or less lens elements are aspheric lenses. A field of view of the lens is in a range between 100 degrees and 165 degrees, and the second lens group has at least one spherical lens.
Claims20
A lens, comprising:
- a first lens group, disposed between a magnified side and a minified side;
- and
- a second lens group, disposed between the first lens group and the minified side,
- wherein the lens comprises six or less lens elements, at least four of the six or less lens elements are aspheric lenses, a field of view of the lens is within a range between 100 degrees and 165 degrees, and the second lens group has at least one spherical lens,
- wherein the first lens group has a negative refractive power, and the second lens group has a positive refractive power.
2 more elements
(canceled)
A lens, comprising:
- a first lens group, disposed between a magnified side and a minified side;
- and
- a second lens group, disposed between the first lens group and the minified side,
- wherein the lens comprises six or less lens elements, at least four of the six or less lens elements are aspheric lenses, a field of view of the lens is within a range between 100 degrees and 165 degrees, and the second lens group comprises a lens element whose Abbe number is greater than 70,
- wherein the first lens group has a negative refractive power, and the second lens group has a positive refractive power.
2 more elements
(canceled)
Dependencies are inferred from the claim text.